Pulverizer



Oct. 8, 1940. w, JESSQN AL 2,217,118

PULVERIZER Filed June 19, 1939 2 Sheets-Sheet 1 Z. Wfisaon Q. CZZVeZZisZ IN VEN TORS.

23 ATTORNEYS.

Patented Oct. 8 1940 UNITED' STATES runvmuzna Lloyd W. Jesson and Glenn C. Nellist, Barker, N. Y.

Application June 19,1939, Serial No. 280,004

3 Claims. (Cl. 83-45) The device forming the subject matter of this application is adapted to be used for pulverizing and handling material of any kind, such as sulphur. One object of the invention is to provide a novel means whereby pulverization and mixing will be brought about in a novel manner through the instrumentality of air blast nozzles. Another object of the invention is to supply novel means whereby the material may be pulverized before it m is subjected to the action of the air blast nozzles. A further object of the invention is to supply novel means for feeding the material into the machine.

It is within the province of the disclosure to 5 improve generally and to enhance the utility ,of

devices of that type to which the present invention appertains.

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings:

Fig. 1 shows in vertical section, a machine constructed in accordance with the invention;

Fig. 2 is a horizontal section on the line 2-2 of Fig. 1;

Fig. 3 is a horizontal section on the line 3-3 of Fig. 1;

Fig. 4 is a vertical sectional view illustrating the pulverizing rollers and the means for mounting them.

In carrying out the invention, there is provided a drum-like casing I, closed at its lower end by a bottom 2, to which are attached supporting 4o legs 3. The casing I has an annular top 4, which extends inwardly to a vertical sleeve 5, arranged axially with respect to the casing I, and terminated short of the bottom 2 of the casing. In the space between the sleeve 5 and the casing I is fixed an annular upper partition 6 having an opening 1. A lower partition 8 extends across the casing I, and across the sleeve 5 in spaced relation to the bottom 2, the lower partition having an opening 9. The openings 9 and 'I are 10- cated 180 degrees remote from each other.

The top 4 of the casing I and the upper partition 6 form an upper annular chamber Ill. The upper annular partition I5 and the partition 8 form an intermediate annular chamber II. The

lower partition 8 and the bottom 2 form a lower annular chamber I2. The top 4 of the casing I is supplied with an outlet I4, .located degrees remote from the opening I in the partition 8. The outlet I 4, the opening I and the opening 9 are under the control of slidably mounted gates I5, actuated by any suitable operating means I6. Air pressure conduits Il extend about the casing I, there beingan air pressure conduit for each of the chambers I0, II and I2. The air pressure conduits I! have any desired number of nozzles 10 I8, discharging circumferentially of the chambers II), II and I2.

If material, such as sulphur, is introduced into either the lower chamber I2 or the intermediate chamber I l, the air blast proceeding from the 15 ing by way of the outlet I4.-

By the operation last above described, the 25 material is pulverized and mixed thoroughly. Especial attention is directed to the fact that the chambers I2, II and III are of progressively decreasing height. Consequently, the impelling air and the material move with increased velocity 30 as they travel upwardly toward the outlet I4, the pulverizing and mixing thus being made the more complete,

A primary means is provided for introducing material into the lower chamber I2, and 'a sec- 5 ondary means is provided for introducing material into the intermediate chamber II. These instrumentalities will be described in order.

A vertical auger tube I9 is secured in the lower partition 8, axially thereof, and axially of the sleeve 5, the auger tube terminating approximately flush with the lower end of the sleeve. To the'upper end of the auger tube I9 is secured a hopper 20. A worm feed 2| operates in the lower part of the hopper 20 and in the auger 45 tube I9. The worm feed 2I is carried by a vertical shaft 22.

The shaft 22 is rotatably mounted in the bottom 2 of the casing I. A foot plate 23 rotates on the bottom 2 of the casing I, and has a hub 50 24 secured to the shaft 22. The shaft 22 and parts carried by it receive motion from a speed reduction gearing 25, disposed below the bottom 2 of the casing, and supported therefrom by a bracket 25. The speed reduction gearing 25 is operated by a belt drive 21, receiving motion from a motor 23.

Short upstanding posts 23' are secured to the foot plate 23, about the shaft 22, and to them are pivoted at their inner ends, as shown at 33, for vertical swinging movement, radius arms 3|. Frusto-conical rollers 32 are mounted to turn on the outer portions of the radius arms 3|, carefully protected anti-friction bearings being employed, as Fig. 4 will show. The rollers 32 ride on the bottom 2 of the casing I, outwardly of the foot plate 23 which turns with the shaft 22.

In order that the rollers 32 may cooperate, under pressure, with the bottom 2 of the casing I, the radius arms 3| are urged downwardly by compression springs 33, finding an upper-end abutment against brackets 34, secured to the foot plate 23.

The'material in the hopper 23 is fed downwardly by the worm conveyer 2|, through the auger tube l3, and flows laterally and outwardly on the bottom 2, into the path of the rollers 32. The material is finely divided and pulverized by the action of the rollers 32, as they move around in an orbit, responsive to the drive imparted to the shaft 22 by the motor 23, the belt connection 21, and the speed reduction gearing 25. The material moves upwardly and circumferentially, under air blast from the nozzles l3, as hereinbefore explained.

The secondary feed for the material includes a tube 35, secured to the casing I, a feed screw 38 advancing the material through the tube 35, into the intermediate annular chamber ll, adjacent to the bottom thereof. Any suitable means,

forming no part of the present invention, may be used for driving the feed screw 33.

The operation of the device has been explained hereinbefore in connection with its various component mechanisms, but, briefly stated, the material from the hopper 23 or from the tube 35 is carried around the casing I, and upwardly, by the impulse at the air nozzles III, the material fed downwardly through the tube I! being pulverized by the rollers 32. The structure, althoughsimple, will be found thoroughly advantageous for the ends in view, and will consummate the objects set forth in the opening portion of this specification.

Having thus described the invention, what is claimed is:

1. In a machine for pulverizing material, a casing having superposed annular coaxial chambers of upwardly and progressively decreasing height, the casing having circumferentially spaced openings establishing communication in series between the top of one chamber and the bottom of the chamber next thereabove, the casing having inlet means discharging material into the lowermost chamber, and outlet means discharging material into the uppermost chamber, and air blast means discharging into the chambers, circumferentially thereof, the relative heights of the chambers being such as to give increased velocity to the air and to the material as they ascend.

2. In a machine for pulverizing material, a cylindrical casing, a sleeve in the casing and concentric with respect thereto, upper and lower partitions extended between the sleeve and the wall of the casing and defining coaxial upper and lower annular chambers of upwardly and progressively decreasing height, each partition having an opening, the openings being circumferentially spaced, one opening constituting a material inlet for the upper chamber, the other opening constituting a material outlet for the upper chamber, the openings connecting the chambers in series, air blast means discharging into the chambers circumferentially thereof, a closure for the sleeve and stopping up-draft therethrough, a material-delivery member discharging through the closure and into the lower chamber, a shaft rotatable in the delivery member, a material-feed carried by the shaft and operating in the delivery member, and a pulverizing means driven by the shaft and operating in the lower chamber.

3. A machine for pulverizing material, constructed as set forth in claim 4, and wherein the pulverizing means comprises a radius arm, means for connecting the radius arm pivotally to the shaft, a roller journaled on the shaft and cooperating with the bottom of the casing, within the lower chamber, and spring means cooperating with the radius arm to increase the pressure produced by the roller.

LLOYD W. JESSON. GLENN C. NELLIST. 

